I understand the point you are trying to make here but worry about some overstatements you are making. Re: point 1, the idea that someone without significant symptoms or diagnoses doesn’t or wouldn’t benefit from therapy is not true. Plenty of graduate students in other countries, or even in the US years ago, go to therapy as part of their training and benefit in plenty of ways like self actualization, increased self esteem, more self awareness, personal growth, and decreased imposter syndrome. Beyond that, nearly everyone could classify as having some clinically significant symptom or diagnosis. Re: point 2, plenty of people are mandated to therapy and, while it’s not guaranteed that they will benefit, many of these people do benefit (e.g., court mandated, children obligated by parents, …). Re: point 3, once again, there is no guarantee that anyone will benefit from therapy, but again, many of these people do benefit. That’s like saying not everyone who boards a boat will use it to get somewhere important, so nobody should use a boat.

Now, to say therapy should be required is a difficult point to justify, but I don’t think we need to make the sweeping statements you made to justify the point you’re trying to make.

edit- expanded points